TOUCH key [key ...]

Available since 3.2.1.

Time complexity: O(N) where N is the number of keys that will be touched.

Alters the last access time of a key(s). A key is ignored if it does not exist.

*Return value

Integer reply: The number of keys that were touched.

*Examples

redis>  SET key1 "Hello" 
"OK"
redis>  SET key2 "World" 
"OK"
redis>  TOUCH key1 key2 
(integer) 2
redis>